发明名称 |
Method and arrangement for compensating for frequency jitter in a laser radar system by utilizing double-sideband chirped modulator/demodulator system |
摘要 |
A frequency jitter compensation radar system which frequency modulates a transmitter laser beam with simultaneously generated up- and down-chirped frequency modulated signals. The frequency modulated transmitter beam is used to scan a target and a reflected light beam is received for each pixel location of a radar system. The reflected light beam is heterodyned with a local oscillator laser beam and upon detection two separate electrical signal channels are provided representing tb up- and down-chirped frequency modulated signals. These up- and down-chirped signal channels are compressed and are further processed as the return signals of a radar system as by averaging the peak detection measurement from the two channels for each pixel to provide frequency jitter compensation commonly resulting from speckle from a target. Electro-optic or acoustic-optic arrangements may be used to frequency modulate the transmitter laser beam. Surface acoustic wave filters may be used for demodulation of the received signal channels. A method of implementing frequency jitter compensation for a radar system is disclosed.
|
申请公布号 |
US6573982(B1) |
申请公布日期 |
2003.06.03 |
申请号 |
US19910762094 |
申请日期 |
1991.09.18 |
申请人 |
RAYTHEON COMPANY |
发明人 |
PRUITT PHILIP ANDREW |
分类号 |
G01S7/497;G01S17/10;(IPC1-7):G01C3/08;G01S13/08 |
主分类号 |
G01S7/497 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|